Electric steelyard weighing machine



Apr. 10, 1923.

, 1,451Qll8 K. SCHEMBER ET 'AL ELECTRIC STEELYARD WEIGHING MACHINE 'Filed Oct. 2l, 1920 -4 sheetssheet l,

/Wen

Apr. l0, 15523.

K. SCHEMBER ET AL ELECTRIC STEELYARD WEIGHING MACHINE Filed Oct. 21,*1920 4 sheets-Sheet 2 Apr. v10, 1923.

K. SCHEMBER ET AL ELECTRIC STEELYARD WEIGHING MACHINE Filed Oct. 2l, 1920 4 sheets-sheet 3 Apr. 10, 1923.

4 sheets-sheet 4 Filed/fom.,

K SCHEMBER ET AL ELECTRIC STEELYARD WEIGHING rMACHINE FIG@ Patented Apr. 1o, 1923. i 1,451,118 l UNITED STATES PATENT OFFICE. 'l

KOBNELIUS SCHEMBER, OF ATZGERSDORF, NEAR TIIENNA, AUSTRIA, AND EUDOLF JOKSCH, F PRAGUE, KAROLINENTHAL, CZECHOSLOVAKIA.

ELECTRIC STEELYARD WEIGHING MACHINE.

Application filed October `21, 1920. Serial No. 418,599.

To all wlw-m. it may concern: frame 1, there is mounted the common axis Be it known that we, KoRNnLIUs SCHEM- 2 of the steelyards 3 and 4. The load acting BER, manufacturer, a citizen of the Republic directly or through a system of levers such of Austria, and residing at Atzgersdorf, as are usual in weighbridges, engages on 5 near Vienna, in the Republic of Austria, the load suspension rod 5 of the load knife- 55 and RUDOLF Jonson, a citizen of the Reedges 6, which ison theload arm 7 of the ublic of Czechoslovakia, and residing at steelyard 3. All loads acting on the'suspenrague, Karolinenthal, in the Republic of sion rod 5 consequently act alike on the Czechoslovakia, have invented certain new whole system of the steelyards 3 and 4. The and useful Improvements in an Electric two steelyards can be graduated in relation 6o Steelyard lrVeighing Machine, of which the to each other in decimals or according to v following is a specification. any other desired system, so thatV for ex- Our invention relates to that kind of auample thesteelyard 3 weighs the units, and tomatic travelling poise devices, wherein two the steelyard 4 the tens of the value of the or more steelyards are simultaneously acted weight of the load applied and each of the 65 upon by the same load and the travelling two steelyards is graduated accordingly. poises of which are adjusted by a single Also the Weights of the travelling poise 8 motor which is thus common for both. The adjustable on the steelyard 3 and that of the scales of the several steelyards begin from travelling poisex9 on the steelyard 4 are 0 and are so graduated according todiiferent arranged according to the weight-value of 70 unit values which are subdivisions ofone the corresponding steelyard. In this mananother, that eaehsteelyard has its definite ner the steelyard 3 is supplementary to the f range of weighing. In accordance with the steelyard 4, since after the rough Weighing magnitude of the load on the weighing mamade by the steelyard 4 ythere follows the .Y chine, in the weighing the travelling poise line weighing made by the steelyard 3. The 75 belonging to one weight-graduation is first adjustment of the travelling poises 8 and 9 adjusted. If the range of weighing of this takes place by means of devices 10 and 11 steelyard is not suflicient .for weighing the respectively, the forked lower end of which load, the travelling poises of the other segrasps with a suitable amount of play the ries are successively adjusted automatically pins 12, 13 respectively projecting from the 80 t until balance is obtained. According to poises. The devices l() and 11 are fixed to i our present invention, the automatic rough a screw-nut 14, 15 respectively, Figure 4, and fine weighing is effected by a pressure -which is mounted on the screw spindle 16, controlling device which automatically con- 17 respectively and has an axial movement,

trols the electric circuits for moving the sev` as soon as the spindle is turned. The trav- 85 Y eral travelling poises in accordance with the elling poises 8 and 9 are provided with automagnitude of the load, the said controlling matic notch-adjustment as described. in the device being inoperative in the position of specification of our former application for equilibrium. Letters Patent Ser. No. 387,769. The trav- One constructional form of our invenelling poise 8 or 9 is thus lbrought by its 9o`A tion is shown by way of example in Figadjusting device 10 or 11, without interures 1 to 4 of the drawing, Fig. 1 being a fering with the free movement of the steelside elevation, a portion of the machine beyards, into the neighborhood of the scaleing broken away, Fig. 2 an end View, Fig. notch in the steelyard corresponding to the 3 a top view and Fig. 4 a transverse secposition of balance, whereupon the poise is 95 tional view, whilst Figures 5 and 6 are diareleased by its adjusting device and by reas'- grams of the electric connections. Figs. 7 on of its own weight or by the action of a and 8 are similar `views as Fig. 1 showing spring is seated automatically into the cormodifications. responding' notch. The screw spindle 16 or In the bearings in the weighing machine 17 and the notched bar 18 or 19 above it loo are supported or fixed on the frame of the weighing machine. Each adjusting device bears at its upper end a tooth 2O or 21,

which by means of a compression spring 5 tends continually to fall into the notches of the barA 181er 19, and on the other hand can slide4` over the projections between the notches, as soonas the adjusting device is moved` byy the4 turning ofthe screw spindles.

The driving ot' the screw spindles 16 and 17 takes place by means of an electromotor 22 by means of the worms 23 and 211y respectively. which engage in the worm-wheels 25 and 2 6 mounted spindles 16 and 17 respectively. The rotation of!" the; wor1n-wheels is transmitted. to theiserewspindles as soon as-the cone clutchmembersf'iand, which are'mounted so as` to slide'` axially on' feathers on the screw spindles, Figure 3, areirespectively thrown intdengagementf with the wormy wheelsv 25 and: 26,- wihich. areV shaped accordingly., by means-.ot actuating orlr's129andl30 made in the lform of bellecranlr levers.y This takes 255 placerasf soonastlie electromagnet 31; or 32 isxenergizedi Vihen the. electromagnet: 31 or 32is cle-energized, the armature which is madeinthe-,orm of a tumblery weight arranged, on` thev actuating lever 29 or 30, 'if causes the: corresponding clutehzmemben 2T or128 to be drawn-out of engagement with l latter the worm'fwheel 25 or 26 and` tue.

wheels: turnl without; taking with' them the screw-spindles-.l'and 17 respectively. The

w actuating-levers 29 and30 are formed at the ends.:l ofi-their: horizontal. arms as switchmernbers and-'slide onthe contact-points 33, Maand-.35; 36. respectively, insucha man# nerlthatinftheir. highest position, when the cone fclutch i is, inf` its .engaged position, they maintaininterrupted lthe connection between 33Y yand 34 or between 35 and l36; on the other hand1w-hen inf their lowest position withfthe cone: coupling out-ot engagement, they con-` fnect the contactxpoints 33 and34t, or 35v and and 17 @are multiple threads and have'apitch,

whiehis of. the same magnitude as the distance: a part of the=notches on the notched `bars18 0119 and asvthe similarly spaced scafleenotches on the :steefiyardsv 3 and '11. One rexf'olutiori off the screw` spindle therefore correspond te :the Vmovement ot the adj usting:derice'belouging thereto and thus also otffthe travelling poise thereof through one space. ofi the` corresponding notches. ln orderto obtain-each time, a whole revolution2 ofthe, screwspindlesv i. e. in order to obtainI exact adjustment ofthe spring-controlled-tooth@ org21 of the adjusting devicelO or lliinto a notch ot the notched bar 18=1o1`f19,fthere islzeyed at the right hand end ot eachscrew spindle a disc 37j and 330i nonmagnetic material. which rotates bef-tweenf two magnets: 39; and 40 respectively looselyV on. theV screw.

3611 The threads or the screw spindles 16 and contains an iron armature which is attracted in the field between the magnet poles. By this means the exact adjustment et the adjusting device is ensured and braking oi the rotating screw spindles at the desiredmoment isl effected.

The control of the electric circuits of the magnets 31, 32 and 39, 40 is as follows;v viz: These magnets are .energized alternately.,

i. e. so long Vas theinagnet 31A or 32 is ener- 75 gized, the Contact points'33 and 3a or 35 and are anopen circuit and the magnet 39 or Ll() is tlc-energized. On the other hand the magnet` 39 or` 110 is excited when the circuit of the magnet 31 or 32 is interrupted 80 and by this meansthe-contact points33andf or 35 and 36 are connected'.

Tnorder to control the mo'tion#mechanism` for the travellin'gpoises, there areemployed` the two so-called selec-torsili and=42 which 85 in the torni given by way oeX'ample in-thev drawing are shown as ordinary spring balances. r

The selector can also loe-providedr on the steelyard itselfl in the form "of suspensionv weights, or can be constructed with atleastone inclination scale. Fig.- 7 shows chelem-- bodiment ot suchl a scale as would be suitable `for the use ot suspension weights. The weighing beam .7 according' to .this construc- 95d tion .isprolonged toward the lett, and toward the right it isv formed as a weighing arm 71. @n this .veighing beam the knife.; edges 10e, 106, 108 and 110 are arranged. symmetrically relative to the a-Xis They i; serve for the reception of cups ofthe sus#4 pensiony weights 100,101, 102.v and: 103.

These are so shaped that they can'seat them selves successively onto a supportthus beL coming disengaged from the weighing bean'i f105.

t0n` their seating races` they are provided withr insulated small contact plates adaptedv to bridge over contacts, whereby lcircuits corresponding to the diagram -in` Fig. 5 aire closed. The'two outer weights-100, 103 ror.- 110. respond to a load of. (tt-ljcriinits, whereinV n representsl the number ot notches in the' .weighing beam, carrying the-small travels ling poises (in thiscasev llt-g.) while'c repree sent-s thev smallest load represented by thislla travelling poise. The two innersuspensioir weights 101 and 102 correspond to c unit When theload attacking atthe imite-edge 6 pulls the weighing beam 'T down, first: the weight 101 will become seated, then, when 120.` the load is sutliciently great. the weight 100.; Thus there are lifted from the'weighingl beam 7 (.1z.-1)c-}c:ac units. Thisis equal to the weight, to which correspond theheavj' travelling poise. Therefore, also in= this instance, the weight is'adjusted forA tare long as the weight restsvr on`r its; support. 'When this weight is litted oit' andsnspended from the weighing beam, while the weight 101 still rests `on its support, only c units are 13G- still adjusted for tare corresponding tol the first stopo-t' thelspring scale. The function f ofthe weights 102 and 103 is analogous, corresponding to', the second spring scale inl l pendulum scale functions as the selector in such a way that the position of equilibrium ot the scaleA as shown, has been so adjusted that the pendulum weight 116 oit the select-oi' 115 deviates from the perpendicular under an angle X (about 300). Over the cups 114, 112 and the bar 113 the pressure of the scale is transmitted to the weighing beam 7.( The positions of the pendulum weight at an angle ot' deviation smaller than X act as negative weights on the weighing beam; wheieby the above spring balance oi' Figure 1 is replaced, whereas the positions ot the pendulum witli'an angle ofdeviation greater than X act positively on the weighing beam, therefore replacing the lower spring balance of Fig. 1. The contact arm 55 rigidly connected with the inclination scale ei'ec-ts the required electric connections.

From Figs. 7 and 8 the connections as shown in the diagram of Fig. 5 will be readily understood, and the explanations vgiven above in connection with the spring-balance equally apply to the constructions according to Figs. 7 and Between tlieadjustable stops of tlietwo selectors there is arranged the end ot the load arm 7 ot' the steelyard 3 in such a. manner that it does not touch the stops in the balance position of the steelyard,'and on the other hand it presses on one of thel two stops when the bal-ance is dis-A turbed. They movable parts of the selectors 41 and 42 bear the sliding contacts 43 and 44 respectively which lserve for connecting thev contact points 45 and 46, and also 45 and 7 or the contact. points 4 8 and 49 or also 48 and 50. The two selectors are so ar? rangedthat the greatest ydeflection of their slidingv contacts 43 `or 44 downwards or upwards, corresponds to the greatest turning moment acting on the system including the two steelyards 3 and 4 by reason ot' the load ing ot ythe weighing machine orvr outward moving of their travelling poisesv, whilst engagementot the slidingcontacts 43 kor ,44.

with the contact points 46 or 49 corresponds to a. turning inomentwhich can be balanced byinoving the poise 8 of the units `steelyard alone. i Accordingly the connection of the cont-acts 45 and 4Gr or 48 and 49 serves 'for the actuation of the magnet 31 for putting in operation the units `poise,and the connection of the contacts 45 and 47 or 48 and 50 for closing the circuit ot the actuating magnet 32`o't' the tens'poise. Fory thispuipose it is immaterial wlietherinagnets or solenoids are employed. The elect-ric connections tor vthc above mentioned contacts and corresponding niagnetsaie given in the diagram Figure any suitable source of continuous current being supplied4 to the niains indicated by the arrow i heads.

v Thel method ot operation of the arrangement determines that the travelling poises 8 and 9 are moved forwards and backwards, that thus the screw spindles 16 and 17 and consequently also the motor 22, can turn in Veach of the two directions of' rotation in c such a manner that. the direction ot' rotation kthat the opposite direction of rotation or a rearward movement of the travelling poises to the left takes place when the load arm 7 presses on the upper selector '42. Iny order toetfect this in the simplest manner, two phases of the polypha'sek current for the squirrel-cage or like motor are connectedto the contacts 57 and 58, Figure 1, in such a manner that the motor 22 in the pressing down. of the yselector 41 and the contact spring is connected for one direction of rotation, but when the selector 42 and its contact spring 56 is pressed up the motor is connected for the oppositer direction of rotation.

The indication of weight of the loads automatically weighed by the weighing machine can be read off from both the scales of the steelyards 3 and 4. rIhe terminals of the first or zero-notch and ot the last notch of the notched bars 18 and 19 each have two contact points 51, 52 and 53, 54 respectively, which are connected together and with the actuating electromagnets 31 and 32 as shown in the diagram Figure 6. In this connection care should be taken that the contacts 51 and 52 of the notched bar Y18 of the units steelyard Sare connected to the actuating magnet 32 of the tenssteelyard 4 and con versely the contacts 53 and 54 o the notched bar 19 of the tens steelyard 4 to the actuating magnet 31, of the steelyard 3. If now Jfor example by a failure of the driving mechanism or by imperfect operation of one of the two selectors, the steelyard tor the higher range of weights is prematurely set out of action and the lower range of weights is setfin motion the tooth for the lower vrange of weights is brought on to the terminal contact of the notched bar. since the balance is not yet secured by the Yfailure that hasoccurred in the lhigher range of weights. The tooth now closes the auxiliary circuit, which again sets the actuating magnet of the higher range .in operation and by and fine Weighing a plurality of travelling poises are successively automatically ad- 10 justed.

In testimony whereof We have hereunto set our hands.

KORNELIUS SCHEMBER. RUDOLF JOKSCH. 

